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Spectroscopy of the heavy helium isotope 7He

  • Yu. B. Gurov
  • L. Yu. Korotkova
  • S. V. Lapushkin
  • R. V. Pritula
  • M. V. Telkushev
  • B. A. Chernyshev
Proceedings of the International Conference “Nuclei-2013: Fundamental Problems and Applications of Nuclei Physics” (LXIII International Meeting on Nuclear Spectroscopy and the Structure of Atomic Nuclei)

Abstract

Three narrow (Γ ≤ 0.5 MeV) low-lying states of 7He with excitation energies of 3.2(1) MeV, 4.9(2) MeV and 6.65(15) MeV are observed simultaneously for the first time in reactions of the absorption of stopped π-mesons 11B(π,pt)7He and 11B(π,dd)7He. No indications of the existence of a level in the area of E x ∼ 1 MeV are found. Highly excited 7He states with parameters E x = 19.6(3) MeV, Γ = 1.7(4) MeV and E x = 25.2(6) MeV, Γ= 4.8(9) MeV are observed.

Keywords

Excited State Excitation Energy Resonant Energy Distri Butions Neutron Rich Isotope 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Allerton Press, Inc. 2014

Authors and Affiliations

  • Yu. B. Gurov
    • 1
  • L. Yu. Korotkova
    • 1
  • S. V. Lapushkin
    • 1
  • R. V. Pritula
    • 1
  • M. V. Telkushev
    • 1
  • B. A. Chernyshev
    • 1
  1. 1.National Nuclear Research University (MEPhI)MoscowRussia

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